(My cat lost 10% of her body weight in about two weeks, for example.) Now, thanks to the litter scale, I get anywhere from two to four daily reminders of my cat’s weight. To test the scale’s ...

Basically, test-and-learn uses small scale, iterative experiments to see what works best. Testing different messaging in a marketing campaign, for example, or perhaps different product features.

The concept of sliding scale fees is to introduce fairness. For example, a hospital may not charge a poor or uninsured patient the market value of the medicine that they receive for an ailment ...